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侏羅紀搏擊俱樂部(MP3+中英字幕) 第104期:史前琥珀解密

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Well, the answer is amber - fossilized tree sap.

答案是琥珀,樹液的化石。
We find all kinds of prehistoric insects, plants, and even small reptiles trapped within amber.
我們能發現琥珀里面裹著各種史前昆蟲、植物甚至小型爬行動物。
We also find gas balls.
我們還能發現氣泡。
And so scientists were able to drill into these pieces of amber and extract the oxygen bubbles within them.
所以科學家們能鉆進這些琥珀把里面的氣泡提取出來。

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This is how we know what the percentage of oxygen used to be.

我們就這樣了解到過去空氣中的氧氣百分比。
Higher oxygen levels also allowed plant eaters to be enormous.
更高的氧氣水平同樣讓以植物為食者長得巨大。
Allosaurus was perfectly suited for taking on big game.
異特龍非常適合捕獵大型獵物。
When you look at the foot and the leg of Allosaurus, it's certain quite powerful.
要是看看異特龍的腳和腿,就知道它們相當有力。
I mean, Allosaurus was a large therapods of its time, one of the top predators.
我是說,異特龍是當時一種大型獸腳類,頂級掠食者之一。
So not only was it built to carry the weight of the animal, but also, was no doubt, used to hold down carcasses and things like that.
所以它的身體設計不僅要承載體重,毫無疑問也被用于抓住尸體和之類的東西。
We have to remember what was Allosaurus eating.
我們別忘了異特龍都吃什么。
They were eating some of the biggest animals the earth has ever seen.
它們吃的是一些有史以來最大的一些動物。
Allosaurus was feeding on sauropods - animals that are multi-times the size of our largest mammals today, the elephant.
異特龍捕食蜥腳類恐龍,這些動物的體型是如今最大的哺乳動物大象的好幾倍。
And they were bringing these animals down.
異特龍能擊敗這些動物。
Allosaurus is an example of how all life adapts and changes to the environment.
異特龍是所有生命根據環境進行適應和改變的范例。
First, you have trees that began to grow to outrageous sizes and it's also when we see the long-necked dinosaurs emerging to take advantage of these tall trees.
首先,樹木開始長得異常茁壯,也是這個時候我們看到長頸恐龍開始出現來利用這些高大樹木。
Camarasaurus was the most common and successful dinosaur of that time.
圓頂龍是那一時期最普遍、最成功的恐龍。
Then Allosaurus had to grow huge because he prey was becoming so huge.
之后異特龍也得長得巨大,因為它們的獵物在變得非常龐大。
So in a sense you could say Allosaurus grew big because trees grew big.
所以在某種程度上可以說異特龍是因為樹木變大而變大。
This was a good all-purpose generalized animal and I think that's one of the reasons for its success.
這真是一種萬能的動物,我覺得這是它成功的原因之一。
It was very widely distributed and fairly abundant.
它的分布范圍很廣,數量也很多。
And that probably was because it was generalized enough that it could adapt to a wide variety of different environments, take a wide variety of prey, and as a result, flourished.
很可能是因為是足夠全面所以能夠適應各種不同的環境,應對個各種各樣的獵物,結果,就繁盛了。
Its ability to adapt allowed Allosaurus to become one of the most successful predators of the late Jurassic.
它的適應能力讓異特龍變成了晚侏羅紀時期最成功的掠食者之一。
Its long stiff tail gave it excellent balance, allowing it to hunt in the open and in dense forests.
又硬又長的尾巴使它擁有出色的平衡能力,在開闊地和密林之中都能狩獵。

重點單詞   查看全部解釋    
certain ['sə:tn]

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adj. 確定的,必然的,特定的
pron.

 
prey [prei]

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n. 被掠食者,犧牲者
vi. 捕食,掠奪,使

 
adapt [ə'dæpt]

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vt. 使適應,改編
vi. 適應,適合

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extract ['ekstrækt,iks'trækt]

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n. 榨出物,精華,摘錄
vt. 拔出,榨出,

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environment [in'vaiərənmənt]

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n. 環境,外界

 
drill [dril]

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n. 鉆孔機,鉆子,反復操練,播種機
v. 鉆

 
stiff [stif]

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adj. 硬的,僵直的,生硬的,拘謹的,不靈活的

 
enormous [i'nɔ:məs]

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adj. 巨大的,龐大的

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sap [sæp]

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n. 半穿甲的(燒結鋁粉); the liquid wi

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abundant [ə'bʌndənt]

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adj. 豐富的,充裕的

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